Update README.md

Add model documentation

README.md

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 # MynaLuna ASR
 
-ONNX version of NVIDIA Parakeet TDT v3 optimized for the MynaLuna application.
+This repository provides an ONNX int8 distribution of the NVIDIA Parakeet TDT v3 automatic speech recognition model for use with the MynaLuna application.
 
 ## Purpose
 
-Automatic Speech Recognition (ASR)
+This repository is maintained to provide a stable download source for the MynaLuna application.
+
+It helps ensure that users can continue downloading the required model even if the original distribution source changes or becomes unavailable.
 
 ## Technical details
 
+- Purpose: Automatic Speech Recognition (ASR)
 - Base model: NVIDIA Parakeet TDT v3
 - Format: ONNX
 - Quantization: int8
 
-## Base model
+## Sources
+
+Original NVIDIA model:
 
 https://huggingface.co/nvidia/parakeet-tdt-0.6b-v3
 
+ONNX conversion used by this repository:
+
+https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/sherpa-onnx-nemo-parakeet-tdt-0.6b-v3-int8.tar.bz2
+
 ## License
 
-This repository contains a derivative version of the original model.
+This repository redistributes a derivative of the original model.
+
+The original NVIDIA model is licensed under CC BY 4.0.
 
-The original model is licensed under CC BY 4.0.
+Please refer to the original repository for licensing details:
+https://huggingface.co/nvidia/parakeet-tdt-0.6b-v3